Is routing approach of Bitcoin Lighning Network "decentralized" and "trust-less"? From the Bitcoin Lightning Network:


  it is possible to find a path across the network similar to routing
  packets on the internet.


Is routing approach of Bitcoin Lighning Network performed in a "decentralized" and "trust-less" manner ?

Also, the fact that in the Bitcoin network there is no routing table does not matter ?
Is routing decentralized and trustless:

Generally, yes. It uses sphinx onion-routing to prevent any peer along the way to know origin/destination of payment. 

Also note that Information of channel balances can leak if routing attempts are used to probe liquidity along a route.

Routing is not robust against sybil attacks, as compromised nodes can determine routes by reconstructing path via payment_hash in the htlc output scripts.

It is, however, incumbent upon the channel operator to ensure the lightning implementation is always synced with a full-node. Only this way can it detect a cheating channel counter-party and broadcast a penalty transaction. Watchtowers may provide vigilance as a service but they are not trustless

Also, note that the lightning network is a separate p2p network.

Discovering topology occurs with peers gossiping.