Your comment is all over the place with assumptions that are odd / incorrect and easily corrected by reading the article.
First of all they went from 1200 -> 1800, not 1500 -> 2100.
Second, just because you are given a preliminary rating of 1500 doesn't mean that you are a 1500. I don't know where you would get that idea from. If my 10 year old nephew signs up for lichess and never plays a game, by your logic he's a 1500 rated player.
Third, an elo of 2100 is definitely not "pro" in chess. Especially not an unofficial lichess rating of 2100. A FIDE rating of 2500 is the minimum to be considered a Grandmaster, which is the beginning of anything resembling pro.
First of all they went from 1200 -> 1800, not 1500 -> 2100.
Second, just because you are given a preliminary rating of 1500 doesn't mean that you are a 1500. I don't know where you would get that idea from. If my 10 year old nephew signs up for lichess and never plays a game, by your logic he's a 1500 rated player.
Third, an elo of 2100 is definitely not "pro" in chess. Especially not an unofficial lichess rating of 2100. A FIDE rating of 2500 is the minimum to be considered a Grandmaster, which is the beginning of anything resembling pro.