The answer is easy: by reading the INCI of the product itself.
The product we are dealing with has a high degree of naturalness? Is it vegan and maybe not so affordable? The deductions that we could draw from it are: it certainly does not contain harmful substances for our skin [for example mineral oils, silicones or parabens], it is certainly almost free of full chemical ingredients [so it does not clog the pores] and, as a third observation, being the price not a "supermarket" one, it will almost certainly mean that it will contain really good quality ingredients.
Is it so important to have a daily skincare routine? No, it is not and now I'll explain you why.
If a cosmetic is healthy, nourishing and effective, the skin will not need a daily application; you can easily use the product three or four times a week if we're talking about face cream and body cream products and, as regards cosmetics such as scrub and mask, it will be more than enough once every seven / eight days.
Let's always remember that low cost is rarely synonymous of good quality and that natural it's always better.
So: natural skincare routine? Yes, it's better!