There are benefits to the combat level requirement: ensuring that people don't accidentally get in over their heads on a task. And it makes sense in canon that combat oriented masters would want "Students" that show practical knowledge (Combat Level) rather than purely academic knowledge (Slayer Level).
Can you share a real life situation where this change would be interesting to have? Preferably give a situation you have actually seen or encountered instead of a made-up anecdote.
You reserved 10 posts for support. Every post that claims no support you have argued against.
Obviously you believe this change deserves to make it to the game. There are merits to keeping the system as is, but you haven't shown the merits of making the change. I'm curious what they are for you to believe in the change this much.