Yes, Hendrik, I agree to you for 100%. What you are saying is absolutly correct and is the case for all websites that are designed for „normal“ users, for buyers, for customers and so on.
Before I started my website https://www.elektrostatikhilfe.de I had also, like the millions of other website designers, to decide for which target audience is my website created. I know my target audience very well since several years. They are working in different factories, in production areas. Normally they have not so much time to take a look on the smartphone only for playing or a little information, because they have to take a look that the production is running. When they find in the production area a problem effected by electrostatic, they are looking for a suitable and fast solution. Yes, they take a first look on the smartphone and they are searching for special electrostatic terms … o.k… Then they find so much information. The most of this informations are written in academic words, very difficult. So they have to scroll and scroll through many difficult text on a small display. And this, I find, is unacceptable. So I put my „academic words“ only in a desktop version, easy to read on a desktop.
By the way, the project Elektrostatik Hilfe is a privat made project beside my job in an electrostatic company. I’m sorry that I cannot satisfy all the calls for the mobil version because there is no time for this.
But this is only my private situation. For all the other people that want to create stimulating, inspiring, interesting and profitable websites (with this wonderful Sparkle Website Designer) it is strictly required to build the websites also, or only in a mobile version.
But I hope all this creative people won’t let bring them out of their way by the strictly SEO rules and always arriving Google „Mobile wake up calls“. Creativity comes first. Sparkle makes it possible.
Kind regards out of our small town Plochingen