Almost everything works when you aim to improve general health, fitness and strength.
Pick a plan, or do random workouts. Both work as long as you progressively challenge the qualities you want to improve.
The guardrails go up when the goal is more specific.
That multi-day hike that’s coming up? You need a plan that challenges the lungs, muscles, and all the rest with carry-over to the task you want to complete.
Generic workouts for generic goals. Specific plans for specific goals.
Both have their place. What you do right now depends on your current goals.
-J