Just my 2 cents...
Go for gastroscopy and colonscopy once when you are 45 (earlier also can) to get a peace of mind. Dont be afraid of the prep and laosai. Cost can be covered by insurance.
I was afraid of the prep, laosai, and colonscopy and delayed it for about 3 years or so after blood is present in FIT. Then, I got recurring piles and finally decided to request for colonscopy this year and found only one polyp. But unfortunately, it turns out to be a stage 3 cancer at age 49 (turning 50 this year). Within 4 months, I have been through surgery and chemotherapy.
If I went for colonscopy much earlier, perhaps its just at pre-cancer stage or stage 1.
I know there are people who keep laughing at people who do colonscopy. But I think best not to, you wont know which day you will need to poke your backside frequently to check.
Lastly, sometimes private practice may be good for only colonscopy. But follow up like surgery etc may not be as good. My friend had complications and now seeking treatment at govt hospital.