I don't think frivolity is necessarily binary — it's more of a spectrum. On one end of the spectrum you have tunnels that connect landmasses separated by massive bodies of water, and allow emergency services to operate efficiently (where the only alternative is a giant suspension bridge).

On the other end of the spectrum you have tunnels such as the LVCC Loop which help convention goers and tourists avoid what is effectively a brisk walk or bike ride (this is also largely a glorified Tesla marketing campaign).

> just like many other construction companies

I'm not sure I believe disfiguring blue collar construction workers is just standard business practice while building a small tunnel just because you posted a link stating that construction can be dangerous. Of course construction as an industry is going to be more dangerous than childcare for instance (and therefore over-represented as an industry in statistics), but that doesn't mean you waive off every accident and chalk it up to a business expense.

My original comment was "Construction related standards make up 5 of the top 10 violated standards[1] by osha.". The link contains a section called "Most frequently violated standards". I'm not sure how you came to conclusion that I thought construction industry was merely dangerous, rather than being frequent violators of safety standards.

The construction industry violates more OSHA standards than other industries because it's more tightly regulated by OSHA, which is of course because it's a dangerous industry. This is the equivalent of saying that hedge funds are overrepresented in SEC violations, or oil companies are overrepresented in EPA violations. It's almost a tautology.