Whilst you’re right, I’d also argue that tubeless success is 90% down to the tyre you’re using, and only about 10% down to the rim. I’ve been running tubeless for more than 11 years now, have tried every method going, and have had nothing but good experiences with both Ghetto tubeless (using the inner tube, not the gaffer tape) and Stans rim strips. I prefer a proper UST rim purely for simplicity, but they’re expensive and relatively heavy for what they are.
Buy proper UST or TLR tyres and you’ll have success with pretty much any method. Only time I’ve ever had a tubeless setup fail on me whilst riding was running a non tubeless Maxxis Crossmark (beads were a bit loose compared to a tubeless version) on my old Roval traverse wheels (not the tightest rim to fit a tyre to out there). Burped it too easily sadly, and learnt my lesson… Stick to proper tubeless tyres!