The reason tubeless is better ,
1. the tyre runs cooler, therefore will have longer mileage life, it also allows you to run lower pressure than tubed if required as the heat build up is less so therefore casing less likely to be damaged than a tube in similar situation . Heat is the biggest killer of tyres.
2. If a tubeless tyre gets a puncture ,99% of the time it will only deflate slowly when compared with a tubed tyre.
3. Due to 2 above it is quite often possible to reinflate the tyre, if need be several times so that you can pick a better time, conditions when to rectify the problem. A tubed tyre does not give you this choice, which could be useful if you are in the middle of sand dunes in 50C .
4. A tubeless tyre can often be repaired by plugging, without even removing it from the vehicle, a tubed tyre has to be removed from vehicle, then from rim .
5. If you push a tubeless tyre off rim due to having the pressure too low , jack vehicle and reinflate. If you pinch tube in same situation see 4
6. You carry tube and casing patch so that if you have sidewall or tread gash you can still use casing(tyre) and you are still no worse off than starting with tubed tyre.
Hope that helps you understand the logic of it all Grunt but you are absolutely entitled to your own opinion .