Low code isn't bad until you try to use a lot of it just like OOP isn't bad until you use too much of it. There is always a temptation that leads one to use too much of these. We have had low-code visual software design for decades. SQL Server Integration Services comes to mind. It does not solve the core problem. Maintainability. The last thing software needs is an invitation to more people that aren't yet aware of the problems of maintenance.

There is not an extremely high barrier to coding. That is not a problem. There is a huge barrier to learning how to produce maintainable and adaptive systems and that barrier is only made worse with low-code tools and services.