Games do not get ongoing support and free content updates without having some way of making continuing to make money. Cosmetics are one of the ways to make money that are the least impactful to gameplay. Selling maps doesn't work, hardly anyone buys them, and it just splits playerbases. Selling functional items is like selling mechanical advantages.

What's your suggestion here? Publishers won't finance ongoing support without an ongoing revenue stream, and, for Multiplayer games at least, customers expect ongoing support at this point. Are there any acceptable monetization methods in your mind, or should we just give up on the idea of games living on after release?