Penny drop moment of "oh right we have to look at the competing engines to see our own weakness"? Frankly it should be obvious.
"If you know the enemy and know yourself, you need not fear the result of a hundred battles."
For me it raises really a odd question about their culture too, since only after inshin's remaster did they add a policy to review developer tools and technology, in a development company.
I'm trying to not read into it any more than that but I can't help but imagine there were board meetings beforehand going 'guys our team want to try using unreal' and some exec going 'no it's banned we only use our own propriety code or else we'll lose our brand and be washed out! All other engines are banned!'.