To bad, depends how you look at it. Those plastic push locks are strong enough for 10 bar.
But then the hose needs to go in perfectly straight, without any sideway force or pull on it.
At work we have problems in that respect. Packaging machines have in certain cases pistons that move along with the packaging material, even for meters.
If it is done well, it takes years before any hose or push lock fails, and then it's most of the time the result of degradadion by heat or UV light.
But some lazy people take a short cut when that happens. Not replacing the hose, but just cutting out the failed piece and by pulling and using up the slack reconnecting the 2 parts with a connector. And if that doesn't work, by rerouting the hose, not even bothering to see if it chafes or pulls at anything. Result. More problems.
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