They do take it seriously enough to mention that jurisdiction fir everything except clause 5 is in Ireland. This definitely went to some lawyer before they used it
Agreed, sneaking crap like this in contracts should be grounds for nullifying them since it shows the companies don't have the expectation that people who click the accept button have read through 20 pages of deliberately obtuse legal junk (never mind actually understanding it enough to make an informed decision to agree to it).
That's not even mentioning the shitty condescending attitude of "lol look at this wacky stuff we do....but we're reserving the right to financially destroy you based on the terms hidden in this document alone"
I'm pretty sure they do it to prove copyright infringement should another dev/publisher copy and paste their exact agreement into their game or service, like how cartographers put fake cities/landmarks on a map to easily prove someone copied their work. I remember an AWS service having a "zombie apocalypse" clause at some point.