I likewise had some of the best American specialists in GI and oncology. I also ended up with six figures in medical debt despite having incredible insurance and a great job. I also experienced excruciating wait times at emergency rooms that dwarfed anything I’ve encountered at the A&E in the UK.
The NHS obviously has massive scope for improvement and isn’t even the healthcare system I have felt the most secure in (that was the Swiss) but I am confident that the NHS is almost certainly better for the average Brit than the US medical system is for the average American.