There's nothing about heeled bullets that makes them more likely to be loose in the case, it's that the heeled bullet design makes it possible to have loose bullets without the bullets just falling out of the case. So the lower end makers don't worry about the bullets being loose.
Why do they do that? Because it's not a problem and it keeps the price down. For example, I shoot most of my .22LR through a revolver and that means virtually anything works if I'm just plinking or working on DA trigger technique.
The answer you are looking for is that poor quality .22LR cartridges have a number of issues and loose bullets can be one of them. If you don't like the loose bullets and/or they are causing you trouble, you can spend more to pay for better quality .22LR and you won't see that problem any more.