Yeah I think everyone feels icky about 'curl https://.. | sh' but to what degree is doing so any more insecure than other "normalized" software distribution practices?
See also:
https://twitter.com/moyix/status/1451318133021675520
Looking at the blog URL and header bar, and the script URL, this is pretty clearly a company blog recommending to use the company's own product. I hardly think that context counts as "unknown".
The article in question which _today_ looks all legit and points to a nice working script, might tomorrow be pointing to someone else's script that's a lot less legit.
And yes, in this imaginary scenario that wordpress install leads to a host of other problems for the company.
No need to make them your problems too though. ;)