Theoretically, it's certainly possible. But, as someone that worked in hotels (including as a Revenue Manager at multiple properties), I think garykung is much closer to reality (at least in a non-COVID setting).

Negotiating a rate takes time and it must be done with someone at the hotel reasonably high up on the management food chain. In the places I worked, that was a Sales Manager, Revenue Manager, Director of Sales, or General Manager. No one else could change rates prior to arrive, in part because the salaries of those folks were tied to meeting revenue goals.

In a large hotel, it simply isn't worth the time to negotiate with a single person. At best, you're getting 365 room nights, with the majority of long-term stays by individuals being under 60 nights. Instead of spending time negotiating for 60 nights, a Sales Manager could be responding to a Request for Proposal (RFP) for a 20-room group staying 4 nights with meeting space and catering. Or, the Sales Manager could be prospecting for a local company that might represent hundreds or thousands of room nights annually.

Similarly, a Revenue Manager's time is usually better spent investigating issues that the revenue management software can't understand. Fixing a potential problem (like identifying an event that is driving a lot of speculative reservations) could result in thousands of dollars of additional revenue.

Never say never. But, most adequately-run hotels aren't going to enter into negotiations with an individual traveler.