People can buy what they want. What I don't like is when the merch tail wags the on-field dog, since that (strictly in my opinion) has had negative aesthetic consequences.
The "you" in the second part of what I said is the teams, not the consumer (apologies if that was unclear). If a team's fans prefer the jersey that has nothing to do with the rest of the team's visual program, then that is an indictment on the team's primary logos, uniforms, etc.