It's hard to avoid centralized centered LN nodes since merchants or nodes with high liquidity/balance naturally would have high connected channel since people would open new channel (merchant) if there aren't any available path/route and there's fewer available path/route (merchants & nodes with high liquidity/balance) if you intend to use LN for bigger payment.
The Lightning Network was designed to handle mostly micro-payments. The maximum amount of bitcoins you can send right now (in a single transaction) is about 0.041 BTC. The issue you mentioned can be solved by introducing multi-path payments which are being developed. It's still a bit unsafe to open a few big channels since there is no proper backup feature in many wallets. I would wait for eltoo with that. Lightning Network still needs some time for development but given the fact that there are so many nodes, there shouldn't be any problems with its adoption.