Clarkson has been a net negative since about 2021. Advanced stats show that the last season of Gobert/Mitchell era, his terrible defense outweighed the offense provided by a bit, then last season it did it by a lot, and then this year he basically fell of the cliff. We're just splitting hairs here, though.
The main issue is that no matter how hard you try to tank, two things happen. One is that even when you put a tanking team out there, players will surprise you. I really don't think a team with Lauri, Sexton, and Kessler wins fewer than 30 games unless you purposely bench people. Then you have the likes of Dunn. He was signed out of the G-League on a 10-day contract. If he didn't stick, it was probably China or lower European leagues for him. He ends up balling and looking like he could easily be a rotation player on a playoff team. It's not as easy to put together a losing teams as it sounds, especially when you don't already have a couple of years' worth of rookies who can't play.
The other thing is that the there are other teams tanking and they simply may be worse than you. Sometimes it's that their players are objectively worse, sometimes it's that their front office is terrible, sometimes it's that their coach is garbage. In some cases, it's all three. Again, you're not the only one playing this tank game. That first year of our tank, a team won 17 games and two others won 22. It's a race to the bottom and there are other racers.
And even if you finish with the worst record of all time, the NBA has been tinkering with odds to the point that the odds would still be 14% if you're the worst team in the league. That's 1-in-7. If you're a gambler, those are not great odds. The worst team in the league hasn't gotten the #1 pick since the league introduced the current odds and slashed the chances of said team from 25% to 14%.