I think the phrasing itself is problematic because it describes some people as broken or less than whole. That puts the emphasis on something wrong with a person rather than something wrong with the system.
Better to talk about the system: “this makes the site less accessible.” Because really, that’s the issue. It’s what you have control over and where the problem lies. Software engineers can change a websites but not the people using them. People should expect websites to accommodate their needs, not the other way around.
Respect is the core principle here. Respect your users and enable them to come as they are. Don’t place the focus on their weaknesses, regardless of what those are or why they have appeared. Focus on how you can build a system that’s accessible to everyone.