Why isn't Wales considered by everyone to be England's first colony?

Why is Wales not universally considered to be England's first colony? No matter where you look online, you will see that the vast majority of content creators, TV channels, etc., don't even mention Wales when such a question comes up.

To me and many more Welsh people, Wales was England's first colony

The conquest of Wales and eventual occupation exceed every condition or definition of a colony; Wales remained so up until gaining devolution in 1998. 

 The most common explanation of what a colony is. 

A colony is .....

.....a country or area under the full or partial political control of another country and occupied by settlers from that country.

Since before the conquest we saw areas of Wales being colonised by Normans; they removed the native Welsh from their lands, built castles and towns, and moved in English and Flemish settlers. this was especially effective in the south of Pembrokeshire, where even today it is called little England beyond Wales. 

It wasn't just Pembrokeshire that was settled, but all across South Wales we see Welsh people removed from the fertile lands and pushed to the heavily wooded and much less fertile lands of the valleys. King Henry I, in particular, encouraged large-scale Norman settlement in south Wales, building the first royal castle at Carmarthen in 1109. these areas were given to trusted lords who became known as marcher lords; they were given special powers normally reserved for the king alone. they were brutal and ruled with an iron fist. 

After Llywelyn's first war,

Longshanks started doing the same. From 1277, and particularly after 1283, Edward embarked on a policy of English colonisation and settlement of Wales, creating new towns like Flint, Aberystwyth, and Rhuddlan. Outside of the towns, Welsh peasants were evicted from key areas, and their land resettled by English peasants: for example, in the Lordship of Denbigh, 10,000 acres were occupied by English settlers by 1334''

In the 1295 ordinance, the Welsh "were not to reside in the English boroughs of Wales, or to bear arms in them, or to conduct trade outside them."

Through the thirteenth century, additional prohibitions were added to the 1295 ordinance at various times. These included ....

provisions that "Welshmen should not acquire English land in Wales Welshmen should not be allowed to live or purchase land in English towns in Wales or the English border counties.

Welshmen should be prohibited from holding assemblies, they should be excluded from all the major posts of civil and military power in Wales, and English burgesses should only be tried and convicted in Wales by fellow Englishmen.

During the Glyndwr war, it Was these English towns that he attacked; they weren't Welsh towns, as some people like to say.

Also during the Glyndŵr wars, more laws were made against the Welsh, and others strengthened.

So in short, Wales was in a war for 200 years where hundreds of battles and tens of thousands of people were killed; it was common for Welsh villages, farms, and churches to be burnt; and Welsh people were killed. Lands were taken off the Welsh by force; castles and towns were built; thousands of English and, in earlier times, Flemings were moved in to work the fertile lands; and the Welsh were forced to the poorer lands. this first happened in southwestWales, then Gwent, and eventually all of Wales.

Welsh laws and legal systems were replaced by English, and eventually Wales was officially annexed.

This was colonisation in every sense of the word, so why isn't Wales recognised by all as England's first colony?