Fair point. Single probably can be done. But still tight. Having done Singapore as part of a larger trip last month, I can vouch though these Summer Escapes look appealing very few may be able to utilize it as you wont like to keep the bookings till the last few days especially for Krisflyer. Dates too are challenges many times. For the hotels. I found better value in IHG transfers + cash bookings.You can do a international trip using 90k ER. But obviously for single. The trip which is on top of my mind is Singapore.
Currently Krisflyer is running Summer escapes. So, you can book Economy return flight for 35k ER points(which translates to 28k Krisflyer points).
So your ticket is done for 35k ER points + some taxes.
Now, you are left with 55k ER points. Transfer this to Accor and you will get 44k Accor points which is equivalent to 880Euro(~78k INR). With this amount you can easily stay for a week in some Ibis hotel, novotel hotel for 4-5 nights. And you can also have dinner in the same hotel where you are staying and redeem.
So, it's quite possible to go for a foreign trip(Singapore) with 90k ER points. You need to take care of lunch and local transportation(Singapore metro pass is some 20SGD out of which 10SGD is refundable) and other activities that you are planning.
In Singapore the travel and stay incidentally are not the biggest expenses but the activities themselves are quite expensive. So if one intends to cover many things a good budget would be needed even if booking via Klook.