I also think there’s this tendency in the industry to want to solve problems on your own without the help from outsiders, even if they know the problem space be

I also think there’s this tendency in the industry to want to solve problems on your own without the help from outsiders, even if they know the problem space better than you do, and even if they’d gladly help (often for free) if asked. It’s especially worrisome when it’s powering a key workload that is essential to the functioning of your business. Sometimes it’s because you might not know whom to consult or recruit, but in this case, the vendor was known.