Saying you "built an MCP server" is literally the same as saying you wrote a method though.
Like you can write a single 20 line method to connect to a MySQL database, add the MCP tool decorator to the method and boom you "built an MCP server".
But no one is posting up to HN saying "Look guys, I wrote a method which connects to a MySQL server", because it takes almost zero expertise and is not novel at all.
I didn't engage further because their comment made it transparent their protest is more about virtue signaling than anything of substance.