Perhaps this strategy in useful early on when entering a new environment to get the lay of the land before embarking on a new project in as yet uncharted waters.
The idea behind them is to learn and understand what they call "the very best" or the world says so. And then to go on to do something even better if possible. It's not about adapting, its about learning and growing...
In Russia there is a similar saying: "Do not go to another's monastery with own charter".
I have noticed many times that without knowing a foreign language, you can easily get in touch with local people, having welcomed them using local language, i.e. demonstrating the knowledge of at least a few words (they appreciate it, but they say to themselves: he tries, but he is not duty to know our complex language ...). If you start right away from English - the consequences can be very unpredictable (normal reaction: I don’t have to know your English! You are not in US, everybody here speak local language)...
Strictly speaking, I am not obliged to learn local culture, traditions, etc. for a three-day visit (sometimes three years is not enougth for this). It is enough to behave decently and not carry with the worst traits of a own national character.
There is such a joke. As it known, in New York there is a huge diaspora of “Russians” (in fact, they are mostly not Russians, but from the USSR, which was, as is known, a multinational state. But the only language in which they can communicate is Russian ( which gradually turned into a strange dialect called Runglish (or Russlish)). So, one says to another: It is very strange, we have been living here for 20 years, but locals people still do not speak Russian ...
It is a wise advice (It is the same:"Why should you obey the Laws - because they are the Laws - and no one should violate them" at least in the country where they were accepted. Being in your country - follow its laws - if they differ [from that accepted in Rome]
If I was in Iran, I would be happy to be treated as Iranian, and if you were in Portugal, I would like that you would be treated as if you were Portuguese. We all are different and unique and we all are equal. It is not a question of uniqueness and copies, it is a matter of INTELIGENCE, INTEGRATION AND RESPECT for the people that open their doors to us, and of fraternity and equality as human beings. The opposite of this universal approach is racisms, nationalisms, ghettos, apartheids, and shame walls and may lead directly to situations like the current immigration crisis in Europe and in North America.
See the RG question that I posted about four years ago.