Even if it did matter, are you saying they were wrong when 5e was launched?
The issue with the logic is that its assumptive and puts a deliberate blinder onto the idea that someone who isn't already experience is going to be confronted with old material and will have to either deny their players the material or learn to juggle two different editions at once.
And all because WOTC is telling people they can use all the same material together. They aren't just speaking to DMs, they are telling players this.
to make it easier for new players?
Its easier for new players to be forced into a situation where they have to deny their players wants or juggle a broken edition with a, presumably, not broken edition?
This is why I noted that this is the same logic. You're ignoring the possibility that new players are going to be affected by this.
WOTC at least had the excuse that they couldn't have predicted their apology to 3E and Pathfinder players would end up being so popular; they had a reason to not expect a lot of new DMs or even players.
I don't know what your excuse is.
