Gavaskar was a slip fielder, at least in my life I never saw him field at fwd short leg, backward short leg or silly point, occasionally maybe short cover and/or short mid wkt. Also he was an ok fielder not a very good fielder imo, he caught as many as he dropped, his weren't the safest hands always. I can easily compare him to Laxman on fielding in slips.
On this matter I think Sunny is starting to lose some marbles, given the fact that the international number of matches have grown what with the Championstrophy, super series and this new fad of stupidity called 2020 World Cup about to begin. I seriously think that cricketers are playing more "international" games, travelling (within the same country forget abroad) a lot more than they used to than at Sunny's time. A great example of this is Australia touring SA and then within a week going to the other spectrum of world and tour Bangladesh, also India playing the last ODI against Eng on Sat and then immediately flying over to Abu Dhabi on a short notice, not only is the travel grueling in some cases adjusting to the timezone changes isn't easy, however much you might wanna push your body at some point of time the work load will take its toll.
In Sunny's time two series were played with atleast a month apart, in fact more than that, which meant the players had more time to recuperate. If Sunny were to play in this era he would break down too, hence his overall comment imo is dumb and reeks of BS nationalism. I do agree that playing for your country is an honor but he can play 365 days for India, come on now please.