It's always a good idea to estimate the number of potential users your app or software will have.
Bear in mind that what works for big tech companies (billions of users) might be just a waste of time and money for the rest of us. Assuming we go through the same detailed, thorough and long research process.
Most of us play in different leagues than big technology companies. But still do very valuable contribution to society without being a monopoly in certain sectors. Many agencies with ex-big tech staff (or vendors of these leading technology companies) might try to convince you to test even the smallest button, though we have to use our common sense.
An example: someone once suggested to test whether to use bold text in a small sentence at the bottom of the screen...
Tons of workshops and research will not guarantee good results.
“That's what Google do”
Big Tech has been trying (successfully) to set the tone in the field of app design and development.
Many UX agencies, in-house teams and individual people involved in product design try to mimic the giants' processes. As a designer, project manager or product owner, always take the free downloadable libraries, patterns, ideas and the millions of articles with a pinch of salt.
Analyse your audience and situation first.
Addition: The Conversation published a very interesting article, recommended read:
"And if sites are looking more similar because many people are using the same libraries, the large tech companies who maintain those libraries may be gaining a disproportionate power over the visual aesthetics of the internet. While publishing libraries that anyone can use is likely a net benefit for the web over keeping code secret, big tech companies’ design principles are not necessarily right for every site."
Yes, websites really are starting to look more similar