It's very hard for me to be so bold as to flatly say, "I designed and built this, and I feel responsible for why it has been such a success." The most I can get out these days is, "I am very proud to see that software still finds value among the other dev teams."
But on the other hand, people can only make decisions based on information that is actually available to them, and so the quiet industrious worker in he corner who rarely pipes up and silently gets the job done but does nothing to make certain his/her contribution is noticed is passed over, because the boss can't magically know that quiet worker is the excellent contributor they are without something imparting that info- good managers will try to understand who's truly contributing in ways like that but even very good managers are frequently subject to imperfect information!
Anyway, I'm glad your advisor told you that, and I'm glad you shared that with me, yours is a succinct way of describing that, I'm almost tempted not to post this reply, as I'm uncertain it adds anything more of value than an emphatic "yes I agree!"
Well, ah, I'm paused at the moment, my wife got semi-unexpectedly pregnant after quite a number of years unsuccessfully trying to do so - she is a salesperson and makes more than me (I was an intern at a genomics startup at the time) so I am being the dad, finishing school, and working on side projects while we map out what we do next - We're planning on swapping roles as soon as I'm finished with school and it's otherwise workable. That does mean I'm focusing more on programming than the data science/bioinformatics side of things, but I'll keep my eyes open for opportunities there too, never know exactly what will happen. Also, the baby is totally amazing, and I adore being his Dad, seriously, I wish stay home dads were a much more common thing than we are, it's freaking fantastic, makes me wish things worked differently to facilitate a pair of parents staying home with anc raising a child as their primary function. :)
I even talked to one of my professors personally about the push, in which I mentioned how the humanities in general are not amazing at 'selling' their contribution to human progress (she enthusiastically agreed - this was a sign that some of us were 'getting it') - part of that deficiency shows is via the incredible antipathy the internet holds towards the Literature major who then becomes a starbucks barista.
I don't always love salespeople, and I often chafe at the thought of having to emphasize my own efforts in an attempt to gain leverage with those of higher status than myself (a situation known to some as 'playing politics') - yet salesmanship is literally universal to the human condition (really want yammer more and explain what I mean by that, but it is time to shutdown for the day. :) )