if my Trezor will be stolen, then I can quickly put a seed to some software wallet and transfer funds to another wallet?
I guess so, you’d then mirror your Trezor wallet in the software wallet and have full access to the funds in the blockchain. This is also why one should never use the same seed in both Trezor and any software wallet. It’s a huge security risk.
If you do this anyway, you should be quick and empty your wallet and transfer the funds to another wallet ASAP, before anyone who finds your Trezor get access to your funds first. The only thing that stops anyone to access your funds then is your device’s PIN code, if used, and/or your Passphrase, if you use a Hidden wallet.
You can restore your wallet in any compatible wallet, it doesn’t have to be a Trezor.