Yes, you actually can over-watt a pc. It's just rather difficult to achieve with better components.
Psus are normally rated with maximum outputs, but modern cpus are dealing with ultra minimum demands at sleep or idle or low loads.
For instance, your pc as stated has a load of @ 270w, so ideally your psu will be double or close. This puts your load around the 50%-70% range, which is not only the most efficient range for the psu, but also thermally the most comfortable.
While psus are able to drop much lower than that range, most are not tested, nor comfortable below 20% (ish) loads and keep any kind of efficiency. A good psu will maintain decent efficiency there, but it's quite easy have a junk psu go off the charts bad, getting 50% or lower efficiency.
So pairing a 1000w POS on a 270w load is ok, your efficiency is @ 90% so pulling 300w from the wall, but below that and just websurfing etc and light loads, at 50% load and 50% efficiency you are still pulling 300w (ish) from the wall. With a good 550w psu, you'd still be well into high efficiency range and that same 50% load would be closer to 150w from the wall.
Over provisioning is generally fine, if done in moderation or with intent, especially considering how long a good psu can last nowadays, just be realistic in expectations. A good 750w psu is more than enough for a 5800x +OC + a 3080 +OC and as much rainbow puke as you can cram into the case. Unless that 750w psu is at a bargain price and/or cheaper than a good 650w, will you realistically forsee having that sort of need/expense.