I totally understand, however, I would say that is exactly where it is most useful. You don't need to actually know or understand any data, since Garmin crunches all those things in the background for you and distills it down to concrete advice on where you are and what to do next. You can really do well with just two metrics (the daily suggested workout and Training Status). You could just follow the workout of the day "Easy run, heart rate range x-y, 31 mins" or "Tempo run, warm up 10 mins, run 15 mins heart rate range x-y, cool down 10 mins" etc. And look at what your Training status is currently, which is things like “Productive”, “Overreaching”, “Maintaining”, etc.

You don’t need to understand about lactic threshold and what types of runs improve it or how high aerobic, low aerobic, and anaerobic runs affect different aspects of improving your fitness or how many rest days are enough. You don’t need to have the experience to know how to balance recovery and training and which factors to even look at. Was your status “Productive” most of the week? Awesome, you know you are improving. What is the next workout? Done.

I hope it works out for you and you enjoy running as a healthy hobby.