Yes, absolutely.
It would focus my mind and make me do it.
However, I looked into it once, sort of expecting the fee to be similar to a cleaner.
The people I found (and this is going back a couple of years) wanted £45ph, and made it very clear they weren't going to actually take any of the stuff away that I was prepared to let go of.
I would definitely pay someone who was able to sell stuff on for me - be that auction houses, or car boots, Vinted or market place.
I have quite a lot of stuff that I no longer need, but don't have the skills or the energy to sell it, and the 'green' in me can't bear throwing away perfectly useable stuff. It's not that I need the money particularly, I'd be as pleased if they were the person who knew of organisations that could use things I no longer want - Nurseries, craft groups, 'props' people from local theatre, small museums, schools, charities supporting people just starting out in an empty flat or house, etc.
I'd use money to employ someone to help me declutter, over using that same money for things like having my nails done, 100%