If electron apps' claimed memory causes your computer to go slow due to swapping, you should complain. But most complaints I see on this topic stem from a discomfort over the reported figure by the operating system. With SSDs and modern virtual memory systems the claimed memory figure is not a sufficient measure to infer the resource utilization of a process. For example, if slack has a bunch of allocated memory that is rarely accessed, it's going to (at worst) land on your SSD and sit there, having no impact on your user experience.

If you want to complain about applications' engineering, you should complain not about claimed memory but about things that are directly affecting resource utilization or user experience like power draw or excessive CPU utilization due to poor programming. Claimed memory must be combined with a profile to show that cold reads are common enough for the claimed memory figure to be correlated with a performance hit. But of course, this often isn't readily available without profiling for all but the most extreme cases, and so engineering types fixate on easily visible measures like claimed memory that likely have no actual resource utilization impact in most cases.