There are certainly countries where gaining citizenship is a challenge, but the Dutch terms for EU migrants the minimum requirements ("speaking the language somewhat fluently, having lived there legally for five years, filling out paperwork") aren't that difficult. Getting through the process takes effort, for sure, but it's not the challenge most people in the world will face (the "living in the country legally for five years" part, mostly; without student visas or special deals between your old government and the Dutch government, you're not likely to get a work visa as any random person on earth).
It doesn’t make a lot of sense.
There is nothing "normal" in expecting to renounce to a previous citizenship if you gain another one [1]. As an Italian citizen living in Sweden I obtained the Swedish citizenship (fortunately before the current government makes it way harder) but I'd never give up my Italian one. I "feel" Italian and owe my country a lot and my happily go back at some point, but I also feel like having the Swedish citizenship is useful, and allows me to vote in a country where I have chosen to live for a good chunk of my life.
Then that settles it, no? You're an Italian citizen who happens to work abroad, not Swedish citizen material.
> Swedish citizenship is useful
That's probably where the friction lies, countries see citizenship as something of greater importance than something to obtain because it's "useful".
Just go and ask any immigrant friend if you have any. Just stop conflating citizenship with any sort of identity or morality, there is nothing like that.
Source: https://en.wikipedia.org/wiki/German_nationality_law#Reform_...