Why are standalone MOSFETs and transistors preferred over integrated load switches?
IC load switches can become obsolete and limiting yourself to them limits you only the specifications they come in. Some things are simple enough that you can just DIY with more versatility and control.
Your &quot;very tricky knots&quot; are not very tricky at all when you consider that it is all beginners having those problems. That is not indication that it is a difficult issue; It is just indication that it is a beginner issue.
The only thing I really find attractive about a load switch is if it integrates the charge pump so I don't need to if I want the efficiency of a high-side NMOS. That takes more parts to do than it tends to be worth.
Also, marketing materials will always extol the virtues of whatever they are trying to sell you.