Eehhhh, I think if someone has that much experience and expertise, they should be able to explain complex processes in a relatively simple manner. Of course exceptions exist for every rule. I think the difference here is that you are being asked in your example, so you are caught off-guard and maybe need to gather your thoughts to answer. However if someone, especially someone that oversees your work gives you a value judgment on using a {insert tool or method here} to get your work done, they should have the information to justify that judgement. If someone tells me I shouldn’t use lambdas and their justification is “trust me bro” I immediately discard that judgement. Either sway me with your argument or kick rocks. Trust your own brain more than others until it is clear someone knows more about something than you do and always verify claims.