The message I had for the OP and his friends has been the exact same sentiment of thousands of Poles for years now.
So, where have you been?From October 2017:Young Poles leave UK to return home as economy booms
Many young and highly educated Poles...motivated by some combination of Brexit's push and the pull of a thriving Polish economy that is hungry for their talents and experience...are trading the professional prestige of London for the comfort of home.
ft.com/content/2329a046-ba6f-11e7-8c12-5661783e5589From March 2017:POLES DEPART Poland's cities are thriving again as thousands return home since Brexit vote
Poland's Development Ministry believes between 100,000 and 200,000 of the 900,000 Poles living in Britain may return home as a result of the country leaving the European Union.
thesun.co.uk/news/3068281/polands-cities-are-thriving-again-as-thousands-return-home-since-brexit-after-we-found-deserted-streets-four-years-ago/From October 2016:Meet the Poles who went back: 'A studio in central Warsaw beats an East London flatshare'
'Whole areas of science are booming and up for grabs' ... Jakub Bochiński, head of the European Space Agency's education office in Warsaw.
'My place is back here' ... Google public policy manager Marta Poślad.