DIY is not bad (speaking as someone who does a lot of DIY). But it costs time. Not everybody has time.
If you work with devices that adhere to some sort of common standard things are usually much easier, less gotchas, less weird hacks that depend on specific versions or intricates of some commercial product etc.
If you work with devices that adhere to some sort of common standard things are usually much easier, less gotchas, less weird hacks that depend on specific versions or intricates of some commercial product etc.