There are several points in your comment that don't match up with my experience.
> Majority of sellers on Lazada were just dropshipping from Chinese wholesalers
Before Alibaba acquisition this was not the case. In fact, it was the Alibaba integration that facilitated this. Secondly, as far as I know it's not drop shipping but they're actual Alibaba sellers that've been onboarded to Lazada.
> There is great profit incentive/arbitrage
Not sure what you mean by this exactly but there's little incentive for arbitrage because because they were Alibaba sellers but also because Alibaba delivers directly as well. So it was more of a marketing move rather than arbitrage. The integration did speed up shipping times however.
> High Tariffs. High Customs/Customs issues. Physical customs inspection. High shipping times.
I have only limited experience with import and that's with tobacco which was time consuming but orderly. For Alibaba goods however, the only one that applies is the high shipping times.
Furthermore for the vast majority of goods below a certain value none of these apply.
> last mile of fulfillment is the issue
Overall true, but there are other issues rather than just being spread out. Specifically traffic, bad infrastructure and operational inefficiencies that impact last mile delivery efficiency even in urban centers.
> consumer base being very spread out
Of course heavily depends on the country with Singapore and Malaysia being far ahead, but Indonesia and Thailand being ~50-60% in urban areas.
> bike courier is still most common way of delivery
If you mean bicycle, that's definitely not the case. If you mean motorcycle, again heavily dependent on the country as well as the use-case.
For instance in Vietnam and Indonesia motorcycles are used frequently, but in Malaysia and Singapore less so. Bicycles are only a gimmick.
Motorcycles are also frequently used for more ad-hoc fulfillment.
> Postal Mail does not work/will not deliver.
1. This might have been true ~5+ years ago but isn't any longer.
2. Even if it was, the post wasn't as developed here as in other parts of the world so a lot of third party logistics providers sprung up to fill the gap and they've better service.