As usual, you don't look far beyond. Imagine you only traveled to JB once a week and you'd already got interrogated by the IO. What happens if you are like those who traverse daily? By the way, this only happened not long after Mamak Kutty took over. During Najib's rule, there was practically no such issues.
Again, Sinkies going to Malaysia are mostly to spend and further boost their commercial revenues. You'll next say it brings up inflation in JB. This is not entirely true also because even without Sinkies in JB for the last 15 months, food and hawker prices in JB are not even down a little. I'm fully aware of this. Also, prices in supermarkets have been increasing tremendously lately due to worldwide inflationary pressures as a result of an anticipated recovery from the Covid-19 pandemic. The analogy of Sinkies going to JB is similar to those Californians going across to Tijuana (Mexico) (many also on day trips) and never did the Mexican government ever complain on this because it brings in revenue and boost retail jobs for their local Mexicans. My wife and I had been there and seen it first hand ourselves.
Again, which stupid Sinkie will want to work in Malaysia for just ⅓ the salary of Singapore? So, the complaint about Sinkies stealing Malaysian's jobs is totally irrelevant. Why Mamak Kutty would want to impose so many restrictions on Sinkies visiting Malaysia? On the other hand, foreigners coming to Singapore are mostly for work purposes and employment. How can you compare this with Sinkies in Malaysia as they are both for unrelated purposes and agenda? Also, there are many more Bangladeshis and illegal Indonesians in Malaysia than Sinkies, but most of them are working in manual jobs which many Malaysians themselves have shunned.
I look forward to you getting your blue IC soon. Thereafter, you can have first hand comparison yourself.