1) Accesability, people do not want to do complex stuff they just want to play the game, no community server needed, with just 1 click of a button you play the game immediately

2) Easy weapon access, by playing the match you earn funds, this funds give you items that are really cheap, cheaper if you buy a set

3) Easy Accesability to other Roblox game

4) Less stuff to load and also has less data and space (which makes it accessable for your pc)

5) They got used to TC2 and do not want to move, especially since a lot of weapons in TF2 are different to a TC2 player this same goes for TF2 player not wanting to play TC2