Is there a reason why Astoria isn't sailing to Lisbon under her own power?

Some Facebook pages suggest steering problems.

Astoria still waiting for a weather window and Brent still waiting to take her.
2nd December 2020

I agree with MO Roy, "money maker thing".
I had to get one when I worked in the US back in 2002, in the 6 months + I was there I never used it once, my old moth eaten paper license was all I needed.

ASTORIA
Looks like she doesn't want to go .... After leaving around seven this morning she's now inbound again.

ASTORIA and her tug, BRENT, are now confirming destination Lisbon, ETD 22/11, 2200hrs - very inconsiderate

All CMV vessels have so far sailed from layup in darkness, even Marco Polo from Avonmouth although she's in Falmouth now for bunkers.
There are some photos/videos on the "Gravesend & Tilbury - "Gateway to the Port of London"" facebook page of all the sailings, not bad considering the time.

VASCO DA GAMA scheduled to leave Tilbury at 03.45 tomorrow (21st), destination unknown.

Columbus sailed last night following Magellan to Piraeus via Gibraltar.

Astoria still waiting for a weather window to be towed to Portugal, tug Brent moored on the river to take her.

Just seen this

https://onemileatatime.com/coronavirus-outbreak-caribbean-cruise/?fbclid=IwAR3heBspceR5JPfPCpohLNdsbeE9ss5Yf4cZdTfnYtS80y1XUnbaIx6Z37w

MAGELLAN scheduled to sail from Tilbury at 18.30 today bound Piraeus.

ASTOR taking bunkers in the Thames Estuary from tanker FREDERICIA before continuing her journey to Aliaga.

ASTORIA left last night in tow of tug Monte Da Luz for Portugal but returned to Tower Wharf shortly after. From facebook, she was assisted by two local tugs departing, two more were called and she was returned to her berth by four local tugs and the Monte Da Luz. No further information.

Looking at the track of MONTE DA LUZ, it looks as if they were having trouble controlling the tow. 

Reported that it was MONTE DA LUZ that developed mechanical problems.  Meanwhile ASTORIA now moved to disused berth a little downstream to free Tower Wharf for cargo operations.

Suggestion on Facebook seems to say the MONTE DA LUZ was not powerful enough and she left this morning returning to Portugal.

The Astor will be heading to Aliaga soon.

Scheduled to leave Tilbury tonight @ 22.30 for Aliaga (PLA movements)

Now showing 09.15 tomorrow (7th Nov)

And she's on her way

https://www.facebook.com/jason.arthur.10/videos/10158546860730865

The Astor will be heading to Aliaga soon.

Scheduled to leave Tilbury tonight @ 22.30 for Aliaga (PLA movements)

Now showing 09.15 tomorrow (7th Nov)

The Astor will be heading to Aliaga soon.

Scheduled to leave Tilbury tonight @ 22.30 for Aliaga (PLA movements)

Astoria due to move from Tilbury dock to Northfleet Terminal tomorrow morning possibly to prepare for tow to Portugal. Tug Monte Da Luz arrived this morning.
No departure date/time yet.

ASTORIA left last night in tow of tug Monte Da Luz for Portugal but returned to Tower Wharf shortly after. From facebook, she was assisted by two local tugs departing, two more were called and she was returned to her berth by four local tugs and the Monte Da Luz. No further information.